package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public CaptchaVo getCaptchaVo() {
        //第三方技术获取验证码对象
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);

        //获取正确的验证码
        String code = specCaptcha.text().toLowerCase();

        //设置存储验证码的key
        String key= RedisConstant.ADMIN_LOGIN_PREFIX+ UUID.randomUUID();

        //获取图像验证码
        //String image = specCaptcha.toBase64();

        //将正确的验证码存储到redis中
        stringRedisTemplate.opsForValue().set(key, code, RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);

        return new CaptchaVo(specCaptcha.toBase64(), key);
    }

    @Autowired
    private SystemUserService systemUserService;

    @Override
    public String login(LoginVo loginVo) {
        //验证验证码是否输入
        if(!StringUtils.hasText(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }
        //验证验证码是否过期
        String codeInRedis = stringRedisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if(codeInRedis == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        //验证验证码是否正确
        if(!codeInRedis.equals(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //验证用户名是否存在
        LambdaQueryWrapper<SystemUser> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(SystemUser::getUsername, loginVo.getUsername());
        SystemUser systemUser = systemUserService.getOne(wrapper);
        if(systemUser == null){
            //表示用户名不存在
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
        //若用户名存在，则验证当前用户是否可用
        if(systemUser.getStatus().equals(BaseStatus.DISABLE)){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }
        //若用户可用，验证密码是否正确
        if(!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        //若密码正确，则通过userId和username生成所对应的token
        return JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());
    }
}
